#include "../my_lvgl_apps.h"

// static void mask_event_cb(lv_event_t * e)
// {
//     lv_event_code_t code = lv_event_get_code(e);
//     lv_obj_t * obj = lv_event_get_target(e);

//     static int16_t mask_top_id = -1;
//     static int16_t mask_bottom_id = -1;

//     if (code == LV_EVENT_COVER_CHECK) {
//         lv_event_set_cover_res(e, LV_COVER_RES_MASKED);

//     } else if (code == LV_EVENT_DRAW_MAIN_BEGIN) {
//         /* add mask */
//         const lv_font_t * font = lv_obj_get_style_text_font(obj, LV_PART_MAIN);
//         lv_coord_t line_space = lv_obj_get_style_text_line_space(obj, LV_PART_MAIN);
//         lv_coord_t font_h = lv_font_get_line_height(font);

//         lv_area_t roller_coords;
//         lv_obj_get_coords(obj, &roller_coords);

//         lv_area_t rect_area;
//         rect_area.x1 = roller_coords.x1;
//         rect_area.x2 = roller_coords.x2;
//         rect_area.y1 = roller_coords.y1;
//         rect_area.y2 = roller_coords.y1 + (lv_obj_get_height(obj) - font_h - line_space) / 2;

//         lv_draw_mask_fade_param_t * fade_mask_top = lv_mem_buf_get(sizeof(lv_draw_mask_fade_param_t));
//         lv_draw_mask_fade_init(fade_mask_top, &rect_area, LV_OPA_TRANSP, rect_area.y1, LV_OPA_COVER, rect_area.y2);
//         mask_top_id = lv_draw_mask_add(fade_mask_top, NULL);

//         rect_area.y1 = rect_area.y2 + font_h + line_space - 1;
//         rect_area.y2 = roller_coords.y2;

//         lv_draw_mask_fade_param_t * fade_mask_bottom =lv_mem_buf_get(sizeof(lv_draw_mask_fade_param_t));
//         lv_draw_mask_fade_init(fade_mask_bottom, &rect_area, LV_OPA_COVER, rect_area.y1, LV_OPA_TRANSP, rect_area.y2);
//         mask_bottom_id = lv_draw_mask_add(fade_mask_bottom, NULL);

//     } else if (code == LV_EVENT_DRAW_POST_END) {
//         lv_draw_mask_fade_param_t * fade_mask_top = lv_draw_mask_remove_id(mask_top_id);
//         lv_draw_mask_fade_param_t * fade_mask_bottom = lv_draw_mask_remove_id(mask_bottom_id);
//         lv_draw_mask_free_param(fade_mask_top);
//         lv_draw_mask_free_param(fade_mask_bottom);
//         lv_mem_buf_release(fade_mask_top);
//         lv_mem_buf_release(fade_mask_bottom);
//         mask_top_id = -1;
//         mask_bottom_id = -1;
//     }

// }

/**
 * Add an fade mask to roller.
 */
void app_2(void)
{
//     static lv_style_t style;
//     lv_style_init(&style);
//     lv_style_set_bg_color(&style, lv_color_black());
//     lv_style_set_text_color(&style, lv_color_white());
//     lv_style_set_border_width(&style, 0);
//     lv_style_set_pad_all(&style, 0);
//     lv_obj_add_style(lv_scr_act(), &style, 0);

//     lv_obj_t *roller1 = lv_roller_create(lv_scr_act());
//     lv_obj_add_style(roller1, &style, 0);
//     lv_obj_set_style_bg_opa(roller1, LV_OPA_TRANSP, LV_PART_SELECTED);

// #if LV_FONT_MONTSERRAT_22
//     lv_obj_set_style_text_font(roller1, &lv_font_montserrat_22, LV_PART_SELECTED);
// #endif

//     lv_roller_set_options(roller1,
//                         "Apps\n"
//                         "Games\n"
//                         "Network\n"
//                         "File\n"
//                         "Hardware\n"
//                         "Music\n"
//                         "Message\n"
//                         "Camera\n"
//                         "Photo\n"
//                         "Setting",
//                         LV_ROLLER_MODE_NORMAL);

//     lv_obj_center(roller1);
//     lv_roller_set_visible_row_count(roller1, 6);
//     lv_obj_add_event_cb(roller1, mask_event_cb, LV_EVENT_ALL, NULL);
}
